Guía técnica para la realización de ensayos en el aislamiento de cables de medio voltaje mediante señales de corriente alterna en muy baja frecuencia “very low frequency” (VLF) para la empresa eléctrica Quito.

Abstract

In the medium voltage distribution network, cable systems are associated with the customer’s outage time of electrical service. The Agencia de Regulacion y Control de Energia y Recursos Naturales No Renovables (ARCERNNR) provides indices such as the Average Interruption Frequency and the Total Interruption Time to evaluate the technical service quality of the primary feeders. Empresa Eléctrica Quito, in compliance with the regulations of the country, has seen the need to implement sophisticated methods, such as very low frequency (VLF) testing, which allow the assessment of certainty in the condition of power cable insulation. The main objective of this study is to elaborate a technical manual based on international standards which facilitates the requirements for field testing of cables and cable systems with VLF energization. The information provided in the technical guide is consistent with aligning the procedures that are currently implemented in underground networks from the EEQ with the sources, instruments, and test equipment available, as well as those that are not available, but are necessary to comply with the program suggested by the standards.